package com.example.springboot.config;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

//自制的拦截器
public class LoginHandlerInterceptor implements HandlerInterceptor {

    //放行不放行
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //登录成功后，应该有用户的session
        Object loginUser = request.getSession().getAttribute("loginUser");
        if(loginUser==null){
            request.setAttribute("msg","没有权限，请先登录");
            request.getRequestDispatcher("/index.html").forward(request,response);
            return false;
        }else{
            return true;
        }

    }

}
